Abstract
Abstract The effect of doping non Jahn-Teller (JT) Cr3+ ion on the crystallographic structure and magnetic ordering has been studied in a series of polycrystalline compounds HoMn1−xCrxO3 (0 0.75, which is attributed to the anisotropic interactions between the Ho3+ and Cr3+ spins. An incommensurate magnetic order corresponding to the wave vector (0.4, 0, 0) is observed in the orthorhombic phase associated with the x = 0.05 sample. The hexagonal phase in the Mn-rich end exhibits a reduced magnetic ordering temperature of 55 K and a spin reorientation at 15 K, in comparison to h-HoMnO3. The temperature variation of dielectric data shows weak magnetodielectric coupling in these compounds.
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